Also, according to advance plotlines also released by HBO, Sookie will have some reservations about Bill's new teenage-girl vampire charge (what could happen?), Jason will join an anti-vampire cult (or maybe it's just people who can't stand Twilight), a spell will be cast on the Merlotte's diner (if only to make the gumbo edible) and Amy still ain't coming back (yeah, I'm the one who misses her).
The trailer for the new season gives away far less. As in, nothing: